A valve is provided that can selectively change the size of a flow channel in a valve in order to modulate the fluid flow through the valve. In one illustrative embodiment, the valve includes a housing that defines a cavity, with an inlet and an outlet extending into the cavity. A diaphragm is positioned...http://www.google.de/patents/US7328882?utm_source=gb-gplus-sharePatent US7328882 - Microfluidic modulating valve
